--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5109201450 dns-udp-queries-received-ipv6: 1101635814 dns-tcp-queries-received-ipv4: 260476084 dns-tcp-queries-received-ipv6: 86803655 dns-udp-responses-sent-ipv4: 4973325271 dns-udp-responses-sent-ipv6: 1100323331 dns-tcp-responses-sent-ipv4: 253073106 dns-tcp-responses-sent-ipv6: 87303259